Pump



Nov. 24, 1931. A.B'.ANT1SE1 L 1,832,390

PUMP

Filed sept. 12, 192s f Z f ff? 7 WITNESS Patented Nov. 24, 1931 UNITED STATES PATENT GFFICEY ALFRED B. ANTISLL, OF NEW YORK, N. Y.

PUMP

Application led September 12, 1928. Serial'No. 305,459.

10 corrosive liouids such as acide. As centrifugal pumps for pumping liquids are not capa` ble of creating a vacuum sutlicient to'lift liquids by suction to any considerable height, it is necessarv toimmerse'the rotor of the pump in the liquid tc be lifted. To obtain the required centrifugal force as heretofore designed a rotor of considerable diameter was reouired which made the pump too bulky t0 be inserted through the narrow passage. Inaf'muchv as acids are corrosive this limitation precluded the use of pumpsfor removing acid or other corrosive liquidsthrough the narrow necksvof carbovs or other containers nnd therefore necessitatedvthe lifting and Vtilting of carboys, which vis troublesome and dangerous. l'

An obiect of mv invention is tol provide a rotarv pump having a pumping element of small diameter capable of being inserted through small passages.

Another obiect of my invention is to provide a rotor for rotary pumps that has -a maximum lifting power for its diameter. Y

Other obiects vand features of my invention are to provide a pump that is portable, light in weight and simple and with a'minimum of moving parts and to provide a pump having a minimum of wearing surfaces exposed to the liquid being pumped and therefore especiallv-adapted for the pumping of corrosive liquids. f Y

With these and other objects in view, my invention comprises the apparatus described and set forth in the following specification and claims.` l

The various features of my invention are illustrated in the accompanying drawings in which: Y

Fig. 1 isa vertical, sectional view of a pump embodying a preferred form of my inven-y' tion,

Fig. 2 is a side view of the driving motor and its mounting on the upper part of the pump, illustrating the manner in which the pump may be inserted through the neck of a cai-hoy,

Fig. 3 is a cross sectional vview taken on line 3-3 of Fig. l, n

Fig. 4 is an elevation of a part of the pump, showing the position of the rotor relative to the pump chamber, and

Fig. 5 is a vertical view of the elements lshown in Fig. 4 with the rotor displaced 'longitudinally of the inner lining of the,v

pump chamber to more clearly show its construction. y

In my invention the pump chamber and the rotor are mounted at the receiving end of a long tubular pump casing of relative. narrow diameter. An inlet .opening is provided at the center of the base or inlet end ofthe pump chamber and the base of the rotor within the chamber is provided with a central receiving space and with a num-` ber of passages or Vgrooves that extend radially from the inlet space and in an upward or longitudinal direction on the outer surface of the rotor and form impelling surfaces on the rotor. These upwardly extending passages may extend vertically or parallel to the axis of the rotor or at an angle thereto and preferably slope upwardly at an angle away from the direction of rotation of the rotor so as to create a. resultant upward orlifting force in addition to the centrifugal force imparted by the rotation of the rotor. The peripheral surface of the rotor is tapered upwardly from the inlet end and the inner surface of the casing is tapered inwardly correspondingly and is provided with longitudinal passages or grooves. preferably inclined slightly in an `opposite direction to those of the rotor. Consequently as the liquid passes upwardly through the longitudinal passages of the rotor, it is forced `into or-taken into longitudinal grooves or passagesin the wall of the pump chamber. The inclination of the chamber grooves serves to provide an additional upward thrust on the liquid. The liquid then passes upwardly between the pump casing and a shaft on which the rotor is Suspended and overflows from an outlet opening.

Referring more particularly to the accompanying drawings, the lifting elements of the pump are positioned within a longitudinal casing 10, having a lower closing plate 11 in which is provided a. central inlet 12. The casing 10 may be inserted into a container to be emptied and the lower end immersed in the liquid therein whereupon the liquid enters through an inlet 12 into a central space 13 within the base of a rotor 1dr, which positioned in the lower end of the casing and is rotated therein by means of a shaft 15. From the central space 1I?) the liquid spreads into the radial grooves or passages 16 in the lower face of the rotor and receives an outward centrifugal force created by the rotation of the rotor. The liquid is coniined in the grooves 1G by the inner surface of a rotor chamber in the casing and it is thereby caused by centrifugal pressure to flow upwardly in longitudinally disposed grooves 17 in the circumference of the rotor. 1n addition to the centrifugal force actingl on the liquid, its vertical movement assisted by having the grooves 17 inclined at a slight angle to the vertical and in a direction away from the direction of rotation as illustrated in Fig. 5, the direction of rotation being lndicated by the arrow. The rapid rotation of the rotor and grooves 17 against the momentum of the liquid provides a component vertical thrust.

The rotational velocity of the liquid that has been given a rapid rotation and upward movement in its passage through the passageways 16 and 17 is transformed into a vertical pressure by reactance against inclined grooves or passageways 18 in a stationary member 19 forming a chamber in the lower part of the casing 10. To facilitate the transferring of liquid from the grooves or passageways 17 to the grooves 18, the lower part Q of the rotor containing the grooves 17 is of a frusto-conical shape. thereby causing the effective depth of the grooves to decrease in an upward direction The adjacent surface of the stationary chamber 19 is tapered upwardly from the lower end to conform to the shape of the rotor, the elfective depth of grooves 1S correspondingly increasing` in an upward direction so that as the liquid mover-t upwardly it transferred from the grooves 17 to the grooves 18.

lnasmuch as the grooves 17 are positioned only at spaced. intervals about the circum ference of the rotor 1l, and as the grooves or passageways 18 are spaced at interv ls in the walls of chamber 19, it will be uiulerstood that the passages on the rotor do not coincide with the grooves or passages 13 at'alltinics curing their rotation, but intersect the passages 18 at varying heights at intervals. However, the total result of the rotation and of the passing of the rotor grooves within the chamber grooves 18 provides a resultant, steady upward stream through the passages 18. 'lhe intersection of the passage;-4 17 and 18 forms a continuous passage from the annular chamber 2.3 to the inlet 12 so thai the pump drains upon being lifted out of the liquid.

The liquid passing upwardly out of the passages 18 is received in an annular space 21 between the casing 10 and an upper cylindrical collar 22 of the chamber element 19 which is of less diameter than the casing 10.

As shown in Figs. 2, 3 and 4, the lower part of the tube closely7 tits the cylindrical part of the chamber element so as to form an outer wall for the channels or passages 18. The chamber 19 and its collar 22 are thereby centered and supported in position in the lower end of the casing 10. The upper part of the rotor is journaled and centered in a iecess in the lower part of the collar Q2. The upper part of the collar is provided with an internal screw-thread, which receives the lower end of a vertical tube Q11, enclosing the shaft. and forming with the inner surface of the casing tube 10 an annular past-,age 25 continuing upwardly from the passage 21. The liquid flowing upwardly through the passage 25 is received in a chamber Q6 in the lower part of a supporting block 27, into the lower end of which the tube '10 is threaded. From the chamber :2(5 the liquid flows outwardly through a delivery tube 28.

The motor for. rotating or driving the shaft 15 is mounted in a housing 29 supported integrally with and above the block 2S) by means of an upright which provides access to the space between the block Q7 and the housing 29. Block and housing 27-29 are provided with a supporting handle 31 in the upper end of which is placed a switch controlling the supply of current to the motor of housing 29. An extensible supporting rod 3e is adjustably mounted with the vhandle 31 and secured by means of thumbscrews 35 so that when the pump casing is inserted through the neck of a carhoy 36, as shown in Fig. 2, the supporting rod 34; may be adjusted to rest on the box 37 of the carboy during the pumping.

The lower end 38 of the shaft of the driving motor is connected to the upper end of the shaft 15 by means of a coupling 39. The shaft 15 extends downwardly from the coupling 39 through a stuffing box 40 in the upper wall of the chamber 26 and thence into the tube Q4 which is threaded into the wall, L1l at its upper end and into the chamber at its lower end. That portion of the shaft which extends through the stui'iing hoz; and down to the rotor 14 is covered with an .acid

Cir

proof hard rubber shell 42 to protect it against corrosion by the liquid being pumped. the tube 24 by means of spaced bearings 43 and 44 between the hard rubber shell 42 and the tube 24. The lower end of the shaft 15 is not threaded directly into the rotor 14, but into an intermediate bronze disc 45. This disc 45 is, in turn, threaded into the upper part of the rotor 14 by means of a threaded stem 46 of larger diameter. lVhen the pump is to be used for pumping acids, or similar corrosive liquids, all part-s such as the casing 10, cap 1l, rotor 14, chamber block 19, tube 24and block 27 are made of hard rubber or other acid proof material. The tube 24 is provided with holes 47 which permit the entrance of fluid to the tube 24 to lubricate the bearings 44. The purpose of the tube 24 is to minimize the swirling that might be induced by the rotation of the shaft 15, as well as to support the lower bearings of the shaft.

Through the above invention a rotary pump of small diameter has been provided, enabling the pump to be inserted through narrow passageways so that carboys, acid tanks and other similar structures may be quickly and easily emptied. The pump is, moreover, of a light and simple construction enabling it to be easily transported and set in position. The rotor is adapted to create a very large pressure or thrust relative to its diameter, and it is thus particularly adapted for a pump of small diameter. It will be understood that the number of passages 17 and 1S may be varied to suit the size, purpose and condition'of use of the apparatus.

Having described my invention what I claim and desire to secure by Letters Patent is:

l. A pump comprising a cylindrical casing and a frusto-conical chamber formed inthe lower part of said casing, said chamber having a central inlet in its base, and a rotor having a frusto-conical portion conforming. to the wall of said chamber, said rotor having passages in its base extending outwardly from the center and communicating with upwardly extending passages in its side wall and said chamber having upwardly eXtending passages in said frusto-conical wall communicating with the passages on said rotor.

2. A pump comprising a cylindrical casing and frusto-conical chamber formed in the lower part thereof, said Chamber having a central inlet in its base, a rotor having a lrus- Jfo-conical portion conforming to the walls of said chamber, said rotor having outwardly extending passages in its base communicating with passages in its frusto-conical face sloging upwardly from the direction of travel, and said chamber having passages in its inner surfaceopening toward the iassages on said rotor. v

The shaft 15 is centered withinV "3. A pump `comprising a cylindrical casing and a frusto-conical chamber 1n the lower part thereof, said chamber having a central inlet in its base, a rotor in said chamber conforming to the walls of said chamber, said rotor having passages in its base extending outwardly from said central inlet to passages in its `frusto-conical surface sloping upwardly from the direction of travel of said rotor, said chamber having passages in its wall sloping upwardly in a direction opposite to the slope of said rotor passages and communicating therewith.

4. A pump of the type described comprising a chamber, said chamber having` a. central inlet in its base, the side walls of said chamber converging upwardly and having passages Vformed in their inner surfaces, a rotor in said chamber conforming to the walls thereof and having passages communicating with said inlet and extending upwardly in its side surface.

5. A pump of the type described compris ing' a chamber` said chamber having a central opening in its base and having upwardly cX- tcnding passages in its side walls, the depth of said passages increasing in a vertical di.- rection, a rotor in said chamber, said rotor having inits surface passages communicating with the central inl et in said chamber and extending' upwardly the depth of said pas .sages decreasing in a vertical direction.

6. A pump of the type described which comprises a tubular casing having a frustoconical chamber in its lower end and a central inlet to said frnsto-conical chamber` said chamber having upwardly extending grooves in its side wall, said grooves becoming deeper towards the upper end of said chamber and communicating with said cylindrical casing, and a rotor in said chamber having upwardly extending grooves communicating with the grooves in said chamber and with said central inlet, the .Qrooves in said rotor decreasing in depth towards their upper portions.

7. A pump of the type described which comprises a cvlindrical casing having a central inlet in its lower end, a stationary element in the base of said casing forming a frusto-conical chamber, the upper end of said stationary element forming an annular passage within said tubular casing and the lower part fitting the wall of said casing, said sta tionary element having grooves cut in the lower part to form passages to said frustoconical chamber of decreasing depth towards the base. and a frusto-conical rotor in said chamber having upwardly extending lgrooves communicating with said central inlet and with said passage grooves in said stationary element.

8. A pump rotor having a frusto-conical portion, a central receiving space in the base of said rotor and upwardly extending grooves in the frusto-conical surface of said rotor,

the depth of said grooves decreasing as the diameter ef' said rotor decreases.

9. A pump r-ator having' a central space at. its hase to receive liquids and impelling surfaces extending outwardly from the central receiving,` space and thence upwardly, the outer edges of said surfaces extending radiallyT inwardly toward their upper portions to decrease the Width of said surfaces.

l0. A pump rotor having a receiving space at its base and upwardly inclined impellinp; surfaces ha ving` 'their outer edges extending` upwardly decreasing their Width With their distance from the base of the rotor.

ll. A pump comprising' a chamber, said chamber ha ring av central inlet at its base and having upwardly extending' grooves in its side Wall and a rotor of a solid block of inaterial havin;Y side Walls closely fitting the Walls of said cnarnber and capable of rotation therein, said rotor having upwardly eX- tending grooves in its side Vall, a recess in its hase in communication with the central inlet of said chamber and passages from said recess to said grooves, the grooves in said wall of chamber and in said rotor being` inclined relatively to each other so as to cross each other at a changing point as said rotor rotates.

In testimony whereof I hereunto aiiX my si gnature.

ALFRED B. LNTISELL. 

